具体实现原理详见 SkinHelp.cs类，实现了对原有控件的重绘，详见源码

    public abstract class SkinHelp{private static SkinColor _currentSkinColor = SkinColor.Default;private static BackgroundStripe _currentStripe = BackgroundStripe.Default;private static Assembly _assemblyWinUI = null;private static Bitmap drawButton = null;private static Bitmap scrollbarButton = null;private static Color defalutborder = ControlBorderBackColor;private static Color defaultGridviewUpColor = Color.YellowGreen;private static Color defaultcontextMenuColor;public static Color DefaultcontextMenuColor{get{Bitmap bitmap = new Bitmap(bxyztSkin.Properties.Resources.borderbm);return bitmap.GetPixel(1, 3);}}public static Color DefaultGridviewUpColor{get { return SkinHelp.defaultGridviewUpColor; }set { SkinHelp.defaultGridviewUpColor = value; }}public static Color Defalutborder{get { return SkinHelp.defalutborder; }set { SkinHelp.defalutborder = value; }}public static Assembly AssemblyWinUI{get{if (_assemblyWinUI == null){_assemblyWinUI = Assembly.Load("bxyztSkin");}return _assemblyWinUI;}}public static SkinColor CurrentSkinColor{get { return _currentSkinColor; }set { _currentSkinColor = value; }}public static BackgroundStripe CurrentBackgroundStripe{get { return _currentStripe; }set { _currentStripe = value; }}public static Color ControlBorderBackColor{get{Bitmap bitmap = new Bitmap(bxyztSkin.Properties.Resources.borderbm);return bitmap.GetPixel(1, 3);}}public static Color FontColor{get { return Color.FromArgb(22, 61, 101); }}public static Bitmap ScrollBarButton{get{if (scrollbarButton == null){scrollbarButton = new Bitmap(bxyztSkin.Properties.Resources.scroll);}return scrollbarButton;}}public static Image ScrollBarUpButton{get { return ScrollBarButton.Clone(new Rectangle(0, 0, 16, 16), System.Drawing.Imaging.PixelFormat.Format32bppPArgb); }}public static Bitmap DrawButton{get{if (drawButton == null){drawButton = new Bitmap(bxyztSkin.Properties.Resources.arrow);}return drawButton;}}public static Image NomalDrawButton{get { return DrawButton.Clone(new Rectangle(0, 0, 16, 16), System.Drawing.Imaging.PixelFormat.Format32bppPArgb); }}public static Image MouseDownDrawButton{get { return DrawButton.Clone(new Rectangle(16, 0, 16, 16), System.Drawing.Imaging.PixelFormat.Format32bppPArgb); }}public static Image MouseMoveDrawButton{get { return DrawButton.Clone(new Rectangle(32, 0, 16, 16), System.Drawing.Imaging.PixelFormat.Format32bppPArgb); }}public static Image NotEnableDrawButton{get { return DrawButton.Clone(new Rectangle(48, 0, 16, 16), System.Drawing.Imaging.PixelFormat.Format32bppPArgb); }}#region ChangeSkinColor#endregion#region FlushMemorypublic static void GarbageCollect(){GC.Collect();GC.WaitForPendingFinalizers();GC.Collect();}public static void FlushMemory(){GarbageCollect();if (Environment.OSVersion.Platform == PlatformID.Win32NT){Win32.SetProcessWorkingSetSize(System.Diagnostics.Process.GetCurrentProcess().Handle, -1, -1);}}#endregion#region Suspend / Resume Redrawinternal static void SuspendRedraw(Control control){if (!control.IsHandleCreated) return;IntPtr hWnd = control.Handle;IntPtr eventMask = IntPtr.Zero;// Stop redrawing:Win32.SendMessage(hWnd, Win32.WM_SETREDRAW, 0, 0);// Stop sending of events:Win32.SendMessage(hWnd, Win32.EM_GETEVENTMASK, 0, 0);}internal static void ResumeRedraw(Control control){if (!control.IsHandleCreated) return;IntPtr hWnd = control.Handle;IntPtr eventMask = IntPtr.Zero;// turn on eventsWin32.SendMessage(hWnd, Win32.EM_SETEVENTMASK, 0, eventMask.ToInt32());// turn on redrawingWin32.SendMessage(hWnd, Win32.WM_SETREDRAW, 1, 0);control.Invalidate(true);}internal static void LockWindowUpdate(Form form, bool lockUpdate){if (lockUpdate){Win32.LockWindowUpdate(form.Handle);}else{Win32.LockWindowUpdate(IntPtr.Zero);form.Invalidate(true);form.Update();}}#endregion/// <summary>/// 修改控件或窗体的边框，例如Textbox或是Form窗体/// </summary>/// <param name="m">消息</param>/// <param name="control">控件对象</param>/// <param name="Nwidth">边框像素</param>/// <param name="objcolor">边框颜色</param>internal static void ResetBorderColor(Message m, Control control, int Nwidth, Color objcolor){//根据颜色和边框像素取得一条线System.Drawing.Pen pen = pen = new Pen(objcolor, Nwidth);//得到当前的句柄IntPtr hDC = Win32.GetWindowDC(m.HWnd);if (hDC.ToInt32() == 0){return;}if (pen != null){//绘制边框 System.Drawing.Graphics g = Graphics.FromHdc(hDC);g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;g.DrawRectangle(pen, 0, 0, control.Width - Nwidth, control.Height - Nwidth);pen.Dispose();}//释放 Win32.ReleaseDC(m.HWnd, hDC);}}public enum SkinColor{Default,草莓,橘子,青草,灰蓝,紫罗兰,巧克力,OFFICE,Undefault}public enum BackgroundStripe{Default,淡淡墨绿,芙蓉轻粉,荷叶嫩绿,橘黄雪花,清雅幽兰,空灵淡蓝,柔和雅灰,腊梅飘香}

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